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A durable and pH-universal self-standing MoC-Mo2C heterojunction electrode for efficient hydrogen evolution reaction.

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cam.issuedOnline2021-11-22
dc.contributor.authorLiu, Wei
dc.contributor.authorWang, Xiting
dc.contributor.authorWang, Fan
dc.contributor.authorDu, Kaifa
dc.contributor.authorZhang, Zhaofu
dc.contributor.authorGuo, Yuzheng
dc.contributor.authorYin, Huayi
dc.contributor.authorWang, Dihua
dc.contributor.orcidLiu, Wei [0000-0002-4071-6017]
dc.contributor.orcidWang, Xiting [0000-0002-5905-7285]
dc.contributor.orcidZhang, Zhaofu [0000-0002-1406-1256]
dc.contributor.orcidGuo, Yuzheng [0000-0001-9224-3816]
dc.contributor.orcidWang, Dihua [0000-0003-2364-8718]
dc.date.accessioned2021-11-22T16:27:35Z
dc.date.available2021-11-22T16:27:35Z
dc.date.issued2021-11-22
dc.date.submitted2021-03-19
dc.date.updated2021-11-22T16:27:33Z
dc.description.abstractEfficient water electrolyzers are constrained by the lack of low-cost and earth-abundant hydrogen evolution reaction (HER) catalysts that can operate at industry-level conditions and be prepared with a facile process. Here we report a self-standing MoC-Mo2C catalytic electrode prepared via a one-step electro-carbiding approach using CO2 as the feedstock. The outstanding HER performances of the MoC-Mo2C electrode with low overpotentials at 500 mA cm-2 in both acidic (256 mV) and alkaline electrolytes (292 mV), long-lasting lifetime of over 2400 h (100 d), and high-temperature performance (70 oC) are due to the self-standing hydrophilic porous surface, intrinsic mechanical strength and self-grown MoC (001)-Mo2C (101) heterojunctions that have a ΔGH* value of -0.13 eV in acidic condition, and the energy barrier of 1.15 eV for water dissociation in alkaline solution. The preparation of a large electrode (3 cm × 11.5 cm) demonstrates the possibility of scaling up this process to prepare various carbide electrodes with rationally designed structures, tunable compositions, and favorable properties.
dc.identifier.doi10.17863/CAM.78377
dc.identifier.eissn2041-1723
dc.identifier.issn2041-1723
dc.identifier.others41467-021-27118-6
dc.identifier.other27118
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/330934
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.subjectArticle
dc.subject/639/4077/909/4086
dc.subject/639/301/299/886
dc.subject/639/638/161/886
dc.subject/128
dc.subject/119/118
dc.subject/147/135
dc.subject/140/146
dc.subject/145
dc.subjectarticle
dc.titleA durable and pH-universal self-standing MoC-Mo2C heterojunction electrode for efficient hydrogen evolution reaction.
dc.typeArticle
dcterms.dateAccepted2021-11-04
prism.issueIdentifier1
prism.publicationNameNat Commun
prism.volume12
pubs.funder-project-idNational Natural Science Foundation of China (National Science Foundation of China) (52031008, 51874211)
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1038/s41467-021-27118-6

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